diff --git a/.github/workflows/run_python_unit_tests.yml b/.github/workflows/run_python_unit_tests.yml
index 87e2809..e9afc40 100644
--- a/.github/workflows/run_python_unit_tests.yml
+++ b/.github/workflows/run_python_unit_tests.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12" ]
+        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/bindings/python/Cargo.toml b/bindings/python/Cargo.toml
index 68ddb97..1166fef 100644
--- a/bindings/python/Cargo.toml
+++ b/bindings/python/Cargo.toml
@@ -8,8 +8,8 @@ name = "codelists_rs"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = { version = "0.20.3", features = ["extension-module"] }
+pyo3 = { version = "0.25", features = ["extension-module"] }
 chrono = { version = "0.4.39", features = ["serde"] }
 codelist-rs = { path = "../../rust/codelist-rs" }
 codelist-validator-rs = { path = "../../rust/codelist-validator-rs" }
-indexmap = "2.9.0"
\ No newline at end of file
+indexmap = "2.9.0"
diff --git a/bindings/python/src/codelist.rs b/bindings/python/src/codelist.rs
old mode 100644
new mode 100755
index b6dae16..b99441b
--- a/bindings/python/src/codelist.rs
+++ b/bindings/python/src/codelist.rs
@@ -91,7 +91,7 @@ impl PyCodeList {
     }
 
     /// Add an entry to the codelist
-    #[pyo3(text_signature = "($self, code, term=None, comment=None)")]
+    #[pyo3(signature = (code, term=None, comment=None))]
     fn add_entry(
         &mut self,
         code: String,
@@ -370,6 +370,7 @@ impl PyCodeList {
     }
 
     /// Add Validation Information to the codelist
+    #[pyo3(signature = (reviewer, status=None, notes=None))]
     fn add_validation_info(
         &mut self,
         reviewer: String,
diff --git a/bindings/python/src/lib.rs b/bindings/python/src/lib.rs
index 31e6c10..6275eb7 100644
--- a/bindings/python/src/lib.rs
+++ b/bindings/python/src/lib.rs
@@ -11,11 +11,11 @@ use factory::PyCodeListFactory;
 
 /// Top-level Python module `codelists_rs`
 #[pymodule]
-fn codelists_rs(py: Python, m: &PyModule) -> PyResult<()> {
+fn codelists_rs(py: Python, m: &Bound<'_, PyModule>) -> PyResult<()> {
     // Add codelist submodule
     let codelist_module = PyModule::new(py, "codelist")?;
     codelist_module.add_class::<PyCodeList>()?;
-    m.add_submodule(codelist_module)?;
+    m.add_submodule(&codelist_module)?;
 
     // Register it globally under the full dotted path
     py.import("sys")?.getattr("modules")?.set_item("codelists_rs.codelist", codelist_module)?;
@@ -23,7 +23,7 @@ fn codelists_rs(py: Python, m: &PyModule) -> PyResult<()> {
     // Add factory submodule
     let factory_module = PyModule::new(py, "factory")?;
     factory_module.add_class::<PyCodeListFactory>()?;
-    m.add_submodule(factory_module)?;
+    m.add_submodule(&factory_module)?;
 
     // Register it globally under the full dotted path
     py.import("sys")?.getattr("modules")?.set_item("codelists_rs.factory", factory_module)?;